US 3,979,108 AGranted

Method and apparatus for removing slag

AssigneeKubota Corporation

InventorsKatsumi Nagasaki, Yoshito Seto, Hiroyuki Yamasaki

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Abstract

Slag on the surface of a molten metal is drawn into the inlet end of a suction pipe which is provided with a water cooling jacket having orifices permitting the flow of water to the inlet end of the pipe for pelletizing the entering slag. The suction pipe is connected to a separator hopper, which is evacuated by an exhaust pump to create the suction, and which includes a slag discharge port closed by an openable valve. A sealed auxiliary hopper receives slag from the discharge port of the separator hopper when the valve thereof is opened, and also includes a slag discharge port closed by an openable valve. The hopper discharge valves are operated alternately by suitable control means so that when one valve is open the other is closed, thereby enabling slag to be continuously sucked, separated, and intermittently discharged from the auxiliary hopper.

Claims17

Dependent claims

Apparatus for removing slag from the surface of a molten metal, comprising:

a suction pipe having an inlet end adapted to be positioned above said surface so as to draw the slag therefrom;
means for supplying water to the interior of said suction pipe adjacent to the inlet end thereof to pelletize entering slag;
a separator hopper communicating with said suction pipe, said separator hopper having a slag discharge port and first valve means for opening and closing said discharge port;
exhaust means for evacuating said separator hopper and applying suction to said suction pipe;
an auxiliary hopper mounted in sealed relation to said separator hopper so as to receive slag from said discharge port, said auxiliary hopper having a slag discharge port and second valve means for opening and closing the same;
and control means for operating said first and second valve means alternately, said control means acting to open the discharge port of the separator hopper when the discharge port of the auxiliary hopper is closed and vice versa whereby slag can be continuously drawn into said separator hopper and intermittently discharged from said auxiliary hopper.

3 more elements

Dependencies are inferred from the claim text.